function fileSelected() {
	var file = document.getElementById('fileToUpload').files[0];
	if (file) {
		var fileSize = 0;
		if (file.size > 1024 * 1024)
			fileSize = (Math.round(file.size * 100 / (1024 * 1024)) / 100).toString() + 'MB';
		else
			fileSize = (Math.round(file.size * 100 / 1024) / 100).toString() + 'KB';

		document.getElementById('fileName').innerHTML = 'Name: ' + file.name;
		document.getElementById('fileSize').innerHTML = 'Size: ' + fileSize;
		document.getElementById('fileType').innerHTML = 'Type: ' + file.type;
	}
}

function uploadFile(url){
	var fd = new FormData();
	fd.append("userfile", document.getElementById('userfile').files[0]);
	var xhr = new XMLHttpRequest();
	xhr.upload.addEventListener("progress", uploadProgress, false);
	xhr.addEventListener("load", uploadComplete, false);
	xhr.addEventListener("error", uploadFailed, false);
	xhr.addEventListener("abort", uploadCanceled, false);
	xhr.open("POST", url);
	xhr.send(fd);
}

function uploadProgress(evt) {
	if (evt.lengthComputable) {
		var percentComplete = Math.round(evt.loaded * 100 / evt.total);
		document.getElementById('progressNumber').innerHTML = percentComplete.toString() + '%';
	} else {
		document.getElementById('progressNumber').innerHTML = 'unable to compute';
	}
}

function uploadComplete(evt) {
	/* This event is raised when the server send back a response */
	console.log(evt.target.responseText);
}

function uploadFailed(evt) {
	alert("There was an error attempting to upload the file.");
}

function uploadCanceled(evt) {
	alert("The upload has been canceled by the user or the browser dropped the connection.");
}  